skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Ultrafast rotation in an amphidynamic crystalline metal organic framework

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America

Amphidynamic crystals are an emergent class of condensed phase matter designed with a combination of lattice-forming elements linked to components that display engineered dynamics in the solid state. Here, we address the design of a crystalline array of molecular rotors with inertial diffusional rotation at the nanoscale, characterized by the absence of steric or electronic barriers. We solved this challenge with 1,4-bicyclo[2.2.2]octane dicarboxylic acid (BODCA)-MOF, a metal-organic framework (MOF) built with a high-symmetry bicyclo[2.2.2]octane dicarboxylate linker in a Zn4O cubic lattice. Using spin-lattice relaxation 1H solid-state NMR at 29.49 and 13.87 MHz in the temperature range of 2.3–80 K, we showed that internal rotation occurs in a potential with energy barriers of 0.185 kcal mol-1. These results were confirmed with 2H solid-state NMR line-shape analysis and spin-lattice relaxation at 76.78 MHz obtained between 6 and 298 K, which, combined with molecular dynamics simulations, indicate that inertial diffusional rotation is characterized by a broad range of angular displacements with no residence time at any given site. Furthermore, the ambient temperature rotation of the bicyclo[2.2.2]octane (BCO) group in BODCA-MOF constitutes an example where engineered rotational dynamics in the solid state are as fast as they would be in a high-density gas or in a low-density liquid phase.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1427926
Report Number(s):
PNNL-SA-125469; 45292; KP1704020
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Vol. 114, Issue 52; ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 66 works
Citation information provided by
Web of Science

References (23)

Rotation of a Bulky Triptycene in the Solid State: Toward Engineered Nanoscale Artificial Molecular Machines journal June 2014
Dynamic Characterization of Crystalline Supramolecular Rotors Assembled through Halogen Bonding journal December 2015
Modular Chemistry: Secondary Building Units as a Basis for the Design of Highly Porous and Robust Metal−Organic Carboxylate Frameworks journal April 2001
Rotational jumps of the tyrosine side chain in crystalline enkephalin. Hydrogen-2 NMR line shapes for aromatic ring motions in solids journal December 1981
A General Theory of Magnetic Resonance Absorption journal November 1954
Molecular dynamics of solid polymers as revealed by deuteron NMR journal March 1983
Systematic Design of Pore Size and Functionality in Isoreticular MOFs and Their Application in Methane Storage journal January 2002
Molecular Rotors and Motors: Recent Advances and Future Challenges journal April 2009
Surface-mounted altitudinal molecular rotors in alternating electric field: Single-molecule parametric oscillator molecular dynamics journal September 2005
A Simple Modification of the Wolff-Kishner Reduction journal December 1946
Zur Konformation des Bicyclo[2.2.2]octan-Systems journal January 1969
Probing the Dynamics of a Protein Hydrophobic Core by Deuteron Solid-State Nuclear Magnetic Resonance Spectroscopy journal September 2009
Amphidynamic Crystals of a Steroidal Bicyclo[2.2.2]octane Rotor: A High Symmetry Group That Rotates Faster than Smaller Methyl and Methoxy Groups
  • Rodríguez-Molina, Braulio; Pérez-Estrada, Salvador; Garcia-Garibay, Miguel A.
  • Journal of the American Chemical Society, Vol. 135, Issue 28 https://doi.org/10.1021/ja4024463
journal May 2013
Dynamic Motion of Building Blocks in Porous Coordination Polymers journal November 2006
Defect-Tolerant Aligned Dipoles within Two-Dimensional Plastic Lattices journal April 2015
Relaxation Effects in Nuclear Magnetic Resonance Absorption journal April 1948
Amphidynamic Character of Crystalline MOF-5: Rotational Dynamics of Terephthalate Phenylenes in a Free-Volume, Sterically Unhindered Environment
  • Gould, Stephanie L.; Tranchemontagne, David; Yaghi, Omar M.
  • Journal of the American Chemical Society, Vol. 130, Issue 11, p. 3246-3247 https://doi.org/10.1021/ja077122c
journal March 2008
Design and synthesis of an exceptionally stable and highly porous metal-organic framework journal November 1999
Ultra-fast Rotors for Molecular Machines and Functional Materials via Halogen Bonding: Crystals of 1,4-Bis(iodoethynyl)bicyclo[2.2.2]octane with Distinct Gigahertz Rotation at Two Sites journal April 2011
Artificial Molecular Rotors journal April 2005
Applicability of the BET Method for Determining Surface Areas of Microporous Metal−Organic Frameworks journal July 2007
Deuterium magnetic resonance study of a smectic liquid crystal journal September 1974
Crystalline molecular machines: function, phase order, dimensionality, and composition journal January 2012

Cited By (16)

Precessional Motion in Crystalline Solid Solutions of Ionic Rotors journal September 2018
A de novo strategy for predictive crystal engineering to tune excitonic coupling journal May 2019
Anisotropic Thermal Expansion as the Source of Macroscopic and Molecular Scale Motion in Phosphorescent Amphidynamic Crystals journal October 2019
Libration of phenyl groups detected by VT-SSNMR: Comparison with X-ray crystallography journal June 2018
Exploiting rotational motion in molecular crystals journal January 2018
Dynamic Motion of Organic Ligands in Polar Layered Cobalt Phosphonates journal August 2018
Atomistic structures and dynamics of prenucleation clusters in MOF-2 and MOF-5 syntheses journal August 2019
Unidirectional rotary motion in a metal–organic framework journal March 2019
Ultrafast Melting of Metal–Organic Frameworks for Advanced Nanophotonics journal December 2019
Nanoscale rotational dynamics of four independent rotators confined in crowded crystalline layers journal January 2020
Fast motion of molecular rotors in metal–organic framework struts at very low temperatures journal July 2020
Synthesis of dipolar molecular rotors as linkers for metal-organic frameworks text January 2019
Rotational Dynamics of Linkers in Metal–Organic Frameworks journal March 2019
Synthesis of dipolar molecular rotors as linkers for metal-organic frameworks journal January 2019
Anisotropic Thermal Expansion as the Source of Macroscopic and Molecular Scale Motion in Phosphorescent Amphidynamic Crystals journal October 2019
A de novo strategy for predictive crystal engineering to tune excitonic coupling text January 2019

Figures / Tables (6)